Condensing pump



Feb, 8, 1927. 1,616,811

P. C- LEMALE counrmsme PUMP 1 I Filed May 28, 1 2

where, employed for Patented Feb, 8,1927.

PAUL CHARL S LnMALn' or rams, nannies.

' conDENsINe PUMP.

'Application filed May 28, 1923, Serial No. 642,017, and in France: June 30, 1922.

The invention relates to vapour,especially steam, condensers =or compressors and its object is to provide a new method and means for condensing or compressing vapor offering numerous advantages over systems of condensation known heretofore.

The novel new method has for its objects to reduce loss of energy, to obtainrapid condensation where employed for that purpose, and to regenerate steam for heating steam-compressing purposes. 7 Y

The invention relates to plants of the kind, hitherto employed for condensing steam which comprise a condensing pump with a rotary ejector for injecting wa ter into the mixing chamber which is supplied with the steam to be condensed.

The new method primarily'consists in giving the ejected jets of liquid, after they have entrained vapour from the m xlng chamber, a free path-while gradually changing their kinetic into pressure energy. f

Tocobtain efficiency, in a steam condensing plant for. example, I dividelthe water to be discharged from the ejector into a plurality of jets distributed over its periphery in such manner that the-whole surface of each and every jet is presented to the steam,

so entraining, cooling and'cOndensing it, and after this entrainment, I allow the jets a free path between annular smooth surfaces to a guide chamber to the discharge outlet, the pressure of the water being so raised from vacuum pressure to atmospheric pressure or more. j

The impeller projects the jets of water directly into the :mixing chamber, without the aid of any distributor, by giving to staggered relation, traversethe free space between the two plates without contact with the latter to any considerable extent, owing,

to the fact that the faces of the plates are parallel with their direction. In this manner a complete transformation of kinetic energy into potential energy is obtained the jn'iode enter finally into the impeller.

owing to the gradual reduction in speed jof "theejected water.

Known pumps of the described first 'subject the injection water to pressure,fwhich water is thereafter distributed, 'eitherfby means of a distributor with tray-like-mein- "the invention isfrepresented in the accom- 1 panying drawings wherein? Figure 1 is 'a sectional elevation of the be rs ofthin disc-formyor by means" of noz I zles'disposed onthe periphery of therotary ejector, which effect/atomization" of the water. In both thesec'ases there is double apparatus, "taken on line in ;Fig.

the lines -Y'Y' in Figure'l', a p

a fragment of the pump wheel taken on the lineO-O in Figure 4, and illustrating and;

Figure at Figure 5'lS a detail elevation of one of the bloclz cover a c j ofconstructionjof the said wheel,

isa plan 'view'of the said frag ment, showing the outlets of the water jets, the staggered arrangement of said outlets "and the mode'of constructing the wheel;

- Figu'r'e6 is a detail vertical sectional view ,of the same on the plane indicated by the line -X,X of Figure 5. 1 j

The body of the apparatus is composed of two halfenvelopes-*olf metal, assembled according to'a diametrical-plan W: The

aspiration con duit for the inj ect'ion water B, is divided-into two branches B B? which dead intoa'n aspiration chamber ,Dfof the impeller this chamber is constituted by the block cover D which comprises a prolongation made in the foundry,fforming an lnterlorchamber, provided 'withan opening D which coincides, making a stanch'joint are shown by arrows, the broken line arrows;

indicating steam and the full line "arrows water.:

with the opening, of the conduit B The The pump wheel C, which is keyed on the 'is called the mixing chamber.

driven shaft 1), draws in injection water through the inlets B and, by the wheels rotation, imparts kinetic energy to this water, the latter being injected in two circular rows of jets in staggered relation from the periphery of the wheel.

At a certain distance from, and concentrically with, the pump wheel, are fitted two circular ejector plates K the inner faces of which are smooth, and are arranged parallel to the direction of the water-jets.

The water-jets which issue from the openings J of the pump Wheel, traverse the an-' nular space F which is provided between the periphery of the pump wheel C and the inlet to the smooth plates K. This space F In fact, whilst traversing the space F, the waterjets produce avacuum, entrain the steam which venters through A, and condense. this steam by contact therewith. The water-jets in annular rows thenpass between the smooth and parallel plates K, and transform their kinetic energy into pressure energy, owing to the gradual reduction of speed of the water whilst moving more or less circumferentially between the plates.

It should be noted that the distance between the two smooth plates K is greater than'the width of the two rows of waterjets and that the surface of the two smooth plates K is parallel to the direction of the jets. These conditions are indispensable for the design of an eXclusively kinetic apparatus. I

On leaving the ejector plates K, the condensing water and the condensed steam discharge into a header S, which leads to the opening T through which air and water are discharged from the pump.

The pump wheel 0 comprises a central disc 0 (Figure 4) and two outer walls C the latter being integral with main vanes C and intermediate vanes G.

These three parts of the pump wheel are assembled by screws H traversing the thickness of the main vanes, the threaded part of these screws being'scre'wed into the central disc C A novelty invthe pumpwheel resides in thealternation of the openings J for the jets at each side of the central disc C Thltl is obtained by displacing one plate C with respect to the other a circumferential dis-- tance equal to half the pitch of the vanes.

The effect of staggering. the openings J will be that each jet ejected by the rotation of the pump wheel C will present its entire surface to the steam to be condensed and produce rapid and economical condensation.

It will be seen that this mode of water ejection utilizes moving water for condensing steamto produce a vacuum, and for raising in pressure the condensed water and inlet for liquid, a rotary impeller journall-ed in the latter chamber and having a plurality of jet-forming passages connecting the two chambers a pair of stationary parallel annular plates spaced radially from the impeller periphery and spaced apart a distance somewhat greater than the width of the outlets of the jet-forming passages and a circumferential guide chamber embracing the outer ends of said plates and having a tangential discharge outlet,

A vapour condensing or compressing device according to claim 1, wherein the i npeller has jet-forming passages having outlets instaggered' relation, 7

3. A vapour condensing or compressing device according to claim 1, wherein the impeller comprises an inner disc and two outer discs the latter eachyhaving jet-forming passages. v,

4 A vapour condensing or compressing device according to claim 1, wherein the the angular pitch of the outlets of the j et-' forming passages in each disc.

In witness whereof I affix my signature.

PAUL CHARLES LElilALE. 

